CN213360612U - Hydraulic cylinder base of integrated reversing valve - Google Patents
Hydraulic cylinder base of integrated reversing valve Download PDFInfo
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- CN213360612U CN213360612U CN202021772099.4U CN202021772099U CN213360612U CN 213360612 U CN213360612 U CN 213360612U CN 202021772099 U CN202021772099 U CN 202021772099U CN 213360612 U CN213360612 U CN 213360612U
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Abstract
The utility model discloses a hydraulic cylinder base of an integrated reversing valve, which comprises a two-position four-way reversing valve, a pilot oil way and a controller; the two-position four-way reversing valve comprises a valve core, a pair of compression springs and a valve cavity, and further comprises a first working oil way, a second working oil way, an oil inlet oil way and an oil return oil way, wherein the first working oil way is communicated with the rodless cavity, the second working oil way is communicated with the rod cavity, and the controller controls the opening and closing of the electric control one-way valve and the pressure relief one-way valve to realize the working position switching of the two-position four-way reversing valve so as to realize the automatic reversing of the hydraulic cylinder. The utility model discloses a pneumatic cylinder jar seat of integrated switching-over valve is integrated in the pneumatic cylinder with electromagnetic directional valve, displacement sensor, only needs external hydraulic source can realize the automatic switching-over, and the controller can be according to sensor signal automatic switching-over to adjust the switching-over stroke at will. In addition, the hydraulic cylinder reduces unnecessary oil passages, reduces liquid loss caused by pipelines, and reduces system heating.
Description
Technical Field
The utility model relates to a pneumatic cylinder technical field, concretely relates to pneumatic cylinder jar seat of integrated switching-over valve.
Background
The hydraulic cylinder is a hydraulic actuator which converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging motion). It has simple structure and reliable operation. When it is used to implement reciprocating motion, it can omit speed-reducing device, and has no transmission gap, and its motion is stable, so that it can be extensively used in various mechanical hydraulic systems.
The hydraulic cylinder reversing in the prior art needs to be realized by a hydraulic system, an independent electromagnetic reversing valve is usually arranged between the hydraulic cylinder and a hydraulic source, and the hydraulic cylinder reversing is realized by changing hydraulic oil to enter different oil cavities in the hydraulic cylinder through the reversing of the electromagnetic reversing valve.
However, the oil circuit with the structure is long, has a large volume, can be only applied to traditional large-scale industrial equipment, cannot be applied to high-integration small-scale hydraulic equipment, and cannot meet the requirements of precision of hydraulic equipment and hydraulic parts in the development period of new industry.
SUMMERY OF THE UTILITY MODEL
For overcoming prior art's defect, the utility model aims to provide a pneumatic cylinder jar seat of integrated switching-over valve only needs external hydraulic pressure source can realize the automatic switching-over of pneumatic cylinder.
Therefore, the utility model provides a hydraulic cylinder seat of integrated switching-over valve, including two-position four-way switching-over valve and guide's oil circuit, two-position four-way switching-over valve includes case, a pair of compression spring, valve pocket, still includes working oil circuit one, working oil circuit two, oil feed oil circuit and oil return oil circuit, working oil circuit one communicates with rodless cavity, working oil circuit two communicates with the cavity of pole; the hydraulic cylinder is characterized in that the starting end of the pilot oil way is communicated with the oil inlet oil way, the middle of the pilot oil way is communicated with one end of the valve cavity, the tail end of the pilot oil way is communicated with the oil return oil way, an electric control one-way valve is arranged between the starting end and the middle of the pilot oil way, and a pressure relief one-way valve is arranged between the middle and the tail end of the pilot oil way, wherein the electric control one-way valve is opened or closed according to an external signal, so that the working position switching of the two-position four-way reversing valve is realized, and.
Further, the valve core is provided with three sections of piston parts, and each section of piston part is provided with a throttling opening.
Further, the pair of compression springs are arranged at two ends of the valve core, and the pressure provided by the compression spring close to one side of the pilot oil path is larger than the pressure provided by the compression spring on the other side of the pilot oil path.
Further, the set pressure of the pressure relief one-way valve is larger than the maximum pressure of the hydraulic source.
Furthermore, the area of the push rod on one side of the valve core, which is close to the pilot oil way, is larger than that of the push rod on the other side.
Further, the electric control one-way valve is provided with a controller in signal connection with the electric control one-way valve.
Further, in the initial state, hydraulic oil enters the valve cavity from the oil inlet oil way, the controller controls the electric control one-way valve to be closed, the two-position four-way reversing valve is located at a normal working position, and the piston assembly of the hydraulic cylinder is in an extension state at the moment; when reversing, the controller controls the electric control one-way valve to be opened, the two-position four-way reversing valve is at a switching working position, and the piston assembly retracts; when the piston assembly is abutted against the valve core, the pressure relief one-way valve is automatically opened, the two-position four-way reversing valve is switched to a normal working position, the piston assembly is extended again, and then the controller controls the electric control one-way valve to be closed and return to an initial state.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses a pneumatic cylinder jar seat has integrateed two-position four-way reversing valve, guide's oil circuit and controller, only needs external hydraulic pressure source can realize the automatic switching-over of pneumatic cylinder, through the automatically controlled check valve of control, controls two-position four-way reversing valve switching-over, and then realizes the pneumatic cylinder switching-over. Furthermore, the utility model discloses a pneumatic cylinder jar seat has reduced the unnecessary pipeline, reduces the liquid that the pipeline caused and decreases, and the lowering system generates heat to this hydraulic cylinder is long-pending littleer, is convenient for assemble and use.
In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.
Drawings
The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of a hydraulic cylinder of the integrated reversing valve of the present invention;
fig. 2 is a partially enlarged schematic view of the hydraulic cylinder of the integrated directional control valve of the present invention;
fig. 3 is a schematic structural view of the integrated reversing valve of the present invention after reversing the two-position four-way reversing valve in the hydraulic cylinder;
fig. 4 is a schematic view of the two-position four-way reversing valve in the hydraulic cylinder of the integrated reversing valve according to the present invention after reversing;
fig. 5 is a partial enlarged view of the valve core in the hydraulic cylinder of the integrated directional control valve according to the present invention; and
fig. 6 is a schematic diagram of a lateral structure of a valve core in a hydraulic cylinder of the integrated reversing valve of the present invention.
Description of the reference numerals
1. A piston assembly; 2. a pilot oil path; 3. a controller; 4. a valve core; 5. a compression spring; 6. a first working oil way; 7. a second working oil way; 8. an oil inlet path; 9. an oil return path; 10. a rodless cavity; 11. a rod cavity; 12. an electrically controlled check valve; 13. a pressure relief check valve; 14. a displacement sensor; 41. an orifice.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Fig. 1-6 illustrate some embodiments according to the present invention.
As shown in fig. 1 and 2, the hydraulic cylinder integrated with the directional control valve comprises a cylinder barrel with a piston cavity, a piston assembly 1 located in the piston cavity of the cylinder barrel, a cylinder base located at one end of the cylinder barrel, a two-position four-way directional control valve arranged on the cylinder base, a pilot oil path 2, and a controller 3.
The controller 3 changes the oil pressure in the pilot oil circuit 2, further pushes the valve core in the two-position four-way reversing valve to move, changes the communication relation of all oil circuits in the two-position four-way reversing valve, further changes the flow direction of the hydraulic oil on two sides of the piston assembly 1, and finally changes the moving direction of the piston assembly 1, thereby realizing the automatic reversing of the hydraulic cylinder.
Specifically, as shown in fig. 2, the two-position four-way selector valve includes a valve element 4, a pair of compression springs 5, a first working oil path 6, a second working oil path 7, an oil inlet path 8, and an oil return path 9.
The pair of compression springs 5 are respectively arranged at two ends of the valve core 4, and the length of the compression spring close to one side of the pilot oil path is larger than that of the compression spring at the other side of the pilot oil path. When two ends of the valve core 4 are pressed by the pair of compression springs 5, the valve core 4 is in a normal working position, the oil inlet oil path 8 is communicated with the first working oil path 6, and the oil return oil path 9 is communicated with the second working oil path 7.
Meanwhile, the compression spring is asymmetrically designed, so that when the piston rod extends out, pressure acts on the right side of the valve core, the displacement distance of the valve core cannot close the port P, the valve core can be prevented from moving leftwards to close the oil inlet hole when the pressure is high, and pressure fluctuation is reduced.
The piston assembly 1 divides a piston cavity into a rodless cavity 10 and a rod cavity 11 which are independent of each other, a working oil path I6 is communicated with the rodless cavity 10 at one end of the inner side of the piston assembly 1, and a working oil path II 7 is communicated with the rod cavity 11 at one end of the outer side of the piston assembly 1. When hydraulic oil entered from oil feed oil circuit 8, hydraulic oil can promote piston assembly 1 and outwards remove, realizes the extension of pneumatic cylinder.
As shown in fig. 2, 5 and 6, the valve core 4 has multiple sections, each section of the valve core is provided with a throttling port 41, when pressure fluctuates, the position of the valve core changes along with the pressure change, and at the moment, the throttling ports 41 on the valve core can be utilized to reduce the pressure fluctuation, so that the shaking of the hydraulic cylinder caused by the pressure fluctuation is reduced.
The two-position four-way reversing valve can just control the size of the throttling opening 41 through the pressure of the inner cavity of the hydraulic cylinder, and the throttling opening 41 is small when the pressure is high; the pressure in the oil cylinder is used for dynamically adjusting the pressure to be equivalent to a pressure reducing valve, so that the aim of stabilizing the pressure can be fulfilled.
Specifically, the pilot oil path 2 is located on one side of the two-position four-way reversing valve, one end of the pilot oil path 2 is communicated with the oil inlet oil path 8, and the middle of the pilot oil path 2 is communicated with one end of a valve cavity of the two-position four-way reversing valve. The pilot oil path 2 is provided with an electric control one-way valve 12, the electric control one-way valve 12 is in signal connection with the controller 3, and the controller 3 opens a switch of the electric control one-way valve 12 to enable the pilot oil path 2 to be filled with hydraulic oil.
However, the area of the push rod on the valve core 4 close to one side of the pilot oil path 2 is larger than that of the push rod on the other side, when the electric control one-way valve is opened, the oil pressure of the pilot oil path is kept the same as that of the rodless cavity, and because the areas of the push rods on the two ends of the valve core are different, the pressure generated is different, so that the valve core 4 can move towards one side of the rodless cavity, the oil inlet path 8 is communicated with the second working oil path 7, the oil return path 9 is communicated with the first working oil path 6, the reversing of the two-position four-way reversing valve is realized, and the reversing of the hydraulic cylinder.
As shown in fig. 2, a pressure relief check valve 13 is further disposed on the pilot oil path 2, the other end of the pilot oil path 2 is communicated with the oil return path 9, and the pressure relief check valve 13 is used for controlling on/off of the pilot oil path 2 and the oil return path 9. Wherein the set pressure of the pressure relief check valve 13 is greater than the maximum pressure of the hydraulic source.
When the piston assembly 1 retracts, the valve core 4 can be abutted by the piston assembly 1 to move, so that the oil pressure in the pilot oil way rises rapidly, when the oil pressure in the pilot oil way is greater than the set pressure of the pressure relief one-way valve 13, the pressure relief one-way valve 13 is opened, the oil pressure in the pilot oil way falls rapidly, the valve core is reversed under the action of the compression spring and the rodless cavity, and the two-position four-way reversing valve completes oil way switching in the process.
As shown in fig. 2, a displacement sensor 14 is arranged inside the piston cavity, the displacement sensor 14 extends along the length direction of the hydraulic cylinder, and the displacement sensor 14 is used for detecting the moving position of the piston assembly 1; meanwhile, the displacement sensor 14 is in signal connection with the controller 3, and the controller 3 can control the opening and closing of the electric control one-way valve 12 according to signals transmitted by the displacement sensor 14, so that the movement of the valve core is controlled, and finally the reversing of the hydraulic cylinder is realized.
The displacement sensor 14 is a magnetostrictive sensor, which adopts an internal non-contact measurement and control technology and measures the actual displacement value of the detected product by accurately detecting the absolute position of the movable magnetic ring; increased the utility model discloses a precision of pneumatic cylinder.
The utility model discloses a working process of pneumatic cylinder of integrated switching-over valve as follows:
when hydraulic oil enters the valve cavity from the oil inlet oil path 8, the controller 3 controls the electric control one-way valve 12 to be closed, at the moment, the pilot oil path 2 is in an open circuit state, the valve core 4 is centered under the pushing of the pair of compression springs 5, the oil inlet oil path 8 is communicated with the first working oil path 6, and the oil return path 9 is communicated with the second working oil path 7, as shown in fig. 2.
At the moment, hydraulic oil enters the rodless cavity 10 through the first working oil way 6 to push the piston assembly 1 to move outwards, and meanwhile, hydraulic oil in the rod cavity 11 on the other side of the piston assembly 1 enters the oil return oil tank through the second working oil way 7 and the oil return oil way 9 to achieve extension of the piston assembly.
In the moving process of the piston assembly, the displacement sensor 14 detects the position of the piston assembly 1 in real time and sends a signal to the controller 3, when the hydraulic cylinder needs to be reversed, the controller 3 controls the electronic control one-way valve 12 to be opened, the pilot oil path 2 is in a path state at the moment, part of hydraulic oil entering from the oil inlet path 8 enters the pilot oil path 2, the hydraulic oil pushes the valve core 4 to move by overcoming the pressure of a spring along with the rising of the oil pressure in the pilot oil path 2, the oil inlet path 8 is communicated with the working oil path II 7, and the oil return path 9 is communicated with the working oil path I6, as shown in fig. 4.
At the moment, hydraulic oil entering from the oil inlet oil way enters the rod cavity through the working oil way II 7 to push the piston assembly to move inwards, and meanwhile, hydraulic oil in the rodless cavity on the other side of the piston assembly enters the oil return oil tank through the working oil way I and the oil return oil way to achieve reversing of the hydraulic cylinder.
When the piston assembly needs to be directly reversed from the contraction state, the controller 3 controls the electric control one-way valve 12 to be closed to reduce the oil pressure in the pilot oil path, and then the valve core is reversed under the action of the spring to keep the hydraulic cylinder extending out and return to the initial state.
In the process that the piston assembly 1 contracts inwards, when the piston assembly 1 moves to contact the valve core 4, oil pressure in the pilot oil way rises rapidly, the pressure relief one-way valve 13 is opened automatically, the oil pressure in the pilot oil way is reduced, the valve core 4 moves to one side of the pilot oil way, the oil way is switched again, the oil inlet oil way 8 is communicated with the first working oil way 6, the oil return oil way 9 is communicated with the second working oil way 7, the piston assembly 1 is extended again, and then the controller 3 controls the electric control one-way valve 12 to close and return to the initial state.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A hydraulic cylinder base of an integrated reversing valve is characterized by comprising a two-position four-way reversing valve and a pilot oil way (2),
the two-position four-way reversing valve comprises a valve core (4), a pair of compression springs (5), a valve cavity, a first working oil way (6), a second working oil way (7), an oil inlet oil way (8) and an oil return oil way (9), wherein the first working oil way (6) is communicated with a rodless cavity (10), and the second working oil way (7) is communicated with a rod cavity (11);
the starting end of the pilot oil way (2) is communicated with the oil inlet oil way (8), the middle part of the pilot oil way (2) is communicated with one end of the valve cavity, the tail end of the pilot oil way (2) is communicated with the oil return oil way (9), an electric control one-way valve (12) is arranged between the starting end and the middle part of the pilot oil way (2), a pressure relief one-way valve (13) is arranged between the middle part and the tail end of the pilot oil way (2),
the electric control one-way valve (12) is opened or closed according to an external signal, the working position switching of the two-position four-way reversing valve is realized, and the automatic reversing of the hydraulic cylinder is further realized.
2. The cylinder block of an integrated directional control valve according to claim 1, characterized in that the valve core (4) has three piston sections, each of which has a restriction (41).
3. The hydraulic cylinder base of the integrated reversing valve according to claim 1, characterized in that a pair of compression springs (5) is arranged at two ends of the valve core (4), and the pressure provided by the compression spring at one side close to the pilot oil path is larger than the pressure provided by the compression spring at the other side.
4. The cylinder block of the hydraulic cylinder of the integrated reversal valve according to claim 1, characterized in that the set pressure of the relief check valve (13) is greater than the maximum pressure of the hydraulic pressure source.
5. The hydraulic cylinder base of the integrated reversing valve according to claim 1, characterized in that the area of the push rod on one side of the valve core (4) close to the pilot oil path is larger than that of the push rod on the other side.
6. The hydraulic cylinder block of an integrated directional valve according to claim 1, characterized in that the electrically controlled check valve (12) is provided with a controller (3) in signal connection therewith.
7. The hydraulic cylinder base of the integrated reversing valve according to claim 1, characterized in that in an initial state, hydraulic oil enters the valve cavity from the oil inlet passage (8), the controller (3) controls the electric control one-way valve (12) to be closed, the two-position four-way reversing valve is located at a normal working position, and a piston assembly of the hydraulic cylinder is in an extension state at the moment; when reversing, the controller controls the electric control one-way valve to be opened, the two-position four-way reversing valve is at a switching working position, and the piston assembly retracts; when the piston assembly is abutted against the valve core, the pressure relief one-way valve (13) is automatically opened, the two-position four-way reversing valve is switched to a normal working position, the piston assembly is extended again, and then the controller (3) controls the electric control one-way valve (12) to be closed and return to an initial state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021772099.4U CN213360612U (en) | 2020-08-21 | 2020-08-21 | Hydraulic cylinder base of integrated reversing valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021772099.4U CN213360612U (en) | 2020-08-21 | 2020-08-21 | Hydraulic cylinder base of integrated reversing valve |
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| CN213360612U true CN213360612U (en) | 2021-06-04 |
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| CN202021772099.4U Active CN213360612U (en) | 2020-08-21 | 2020-08-21 | Hydraulic cylinder base of integrated reversing valve |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112178006A (en) * | 2020-08-21 | 2021-01-05 | 合肥长源液压股份有限公司 | Automatic reversing hydraulic cylinder |
| WO2024017012A1 (en) * | 2022-07-22 | 2024-01-25 | 北京三一智造科技有限公司 | Hydraulic stepping control device and working machine |
-
2020
- 2020-08-21 CN CN202021772099.4U patent/CN213360612U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112178006A (en) * | 2020-08-21 | 2021-01-05 | 合肥长源液压股份有限公司 | Automatic reversing hydraulic cylinder |
| WO2024017012A1 (en) * | 2022-07-22 | 2024-01-25 | 北京三一智造科技有限公司 | Hydraulic stepping control device and working machine |
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